Optimization and design high-power and high-efficiency klystron output coupler
-
摘要: 输出耦合器作为速调管关键部件，其性能直接关系到速调管的整体表现。然而，耦合器故障却是速调管及多种真空电子设备中最为常见的问题之一，特别是在高连续波功率运行场景下，这一问题更为突出。针对连续波650 MHz/800 kW高效率速调管，对输出耦合器进行优化设计，并在单注和多注速调管耦合器测试方面取得了重要突破：单注速调管输出耦合器在连续波模式下的测试功率已达到690 kW以上，为了进一步增加功率容量，本文采用T-bar结构过渡，并对耦合器进行优化设计，使陶瓷附近电场分布更均匀；而多注速调管矩形波导窗输出耦合器最高测试功率达到全驻波115 kW。此外，通过对耦合器的结构、材料以及散热方式进行分析与优化，积极探索提升耦合器功率容量的多种可能途径，进一步增强了速调管的稳定性和可靠性。Abstract: Microwave vacuum electronic devices play a crucial role in various fields such as scientific research and industry. Particularly, the klystron has been essential in nuclear fusion research, high-energy physics experiments, and industrial radiation processing. The output coupler, a key component of the klystron, directly impacts its overall performance. However, coupler failures are among the most common issues in klystrons and various vacuum electronic devices, especially prominent in scenarios involving high continuous wave power operation. For the development of a high-efficiency tunable 650 MHz/800 kW continuous wave klystron, optimization design of the output coupler was conducted. Significant progress was achieved in the testing of the output couplers for single-beam and multi-beam tunable klystrons. In continuous wave mode, the test power of the output coupler for the single-beam tunable klystron has exceeded 690 kW. To further increase power capacity, a T-bar transition structure was employed, and the coupler was optimized to achieve a more uniform electric field distribution near the ceramic. Additionally, the rectangular waveguide window output coupler for the multi-beam tunable klystron achieved a maximum test power of 115 kW in full standing wave conditions.
-
Key words:
- klystron /
- output coupler /
- high-power test /
- T-bar /
- rectangular window
-
图 4 单注速调管输出耦合器温度和应力分析
Figure 4. Thermal and stress analysis of the single-beam klystron output coupler
图 7 单注速调管耦合器冷测结果
Figure 7. The S-parameter test of single-beam klystron output coupler
-
[1] Gao Jie. CEPC technical design report: accelerator[J]. Radiation Detection Technology and Methods, 2024, 8(1): 1-1105. doi: 10.1007/s41605-024-00463-y [2] Zhou Zusheng, Chen Y, Chi Yunlong, et al. Progress on CEPC 650 MHz klystron[J]. International Journal of Modern Physics A, 2021, 36: 2142011. doi: 10.1142/S0217751X21420112 [3] Lu Zhijun, Fukuda S, Zhou Zusheng, et al. Design and development of radio frequency output window for circular electron–positron collider klystron[J]. Chinese Physics B, 2018, 27: 118402. doi: 10.1088/1674-1056/27/11/118402 [4] Wang Shengchang, Fukuda S, Lu Zhijun, et al. Design study and modeling of multi-beam klystron for circular electron positron collider[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2022, 1026: 166208. doi: 10.1016/j.nima.2021.166208 [5] Saito Y. Breakdown phenomena in rf windows[J]. AIP Conference Proceedings, 1995, 337(1): 373-382. [6] Vyas S, Shekhawat N, Maurya S, et al. Computer simulation and analysis of 350-MHz high-power coaxial RF window and T-bar transition[J]. IEEE Transactions on Plasma Science, 2012, 40(10): 2693-2698. doi: 10.1109/TPS.2012.2210056 [7] Naito F, Sakai H, Yoshimoto S, et al. The input coupler for the KEKB ARES cavity[C]//Proceedings of the 1st Asian Particle Accelerator Conference. 1998: 776. [8] Huang Tongming, Pan Weimin, Ma Qiang, et al. High power input coupler development for BEPCII 500MHz superconducting cavity[J]. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2010, 623(3): 895-902. doi: 10.1016/j.nima.2010.08.108 [9] 丁耀根. 大功率速调管的技术现状和最新进展[J]. 真空电子技术, 2020(1):1-25Ding Yaogen. Technical status and latest progress of high power klystrons[J]. Vacuum Electronics, 2020(1): 1-25 [10] Ko S K, Lee B Y, Lee K O, et al. First operating test of the 700 MHz 1 mw prototype klystron for a proton accelerator[J]. Nuclear Engineering and Technology, 2006, 38(8): 779-784. [11] Rimmer R A, Koehler G, Saleh T, et al. A high-power L-band RF window[C]//PACS2001. Proceedings of the 2001 Particle Accelerator Conference (Cat. No. 01CH37268). 2001: 921-923. [12] Wang Shengchang, Zhou Zusheng, Lu Zhijun, et al. Development of RF windows for 650 MHz multibeam klystron[J]. Nuclear Science and Techniques, 2023, 34: 136. doi: 10.1007/s41365-023-01294-0 [13] Xiao Ouzheng, Fukuda S, Zhou Zusheng, et al. Design and high-power test of 800-kW UHF klystron for CEPC[J]. Chinese Physics B, 2022, 31: 088401. doi: 10.1088/1674-1056/ac6b26 [14] Lu Zhijun, Zhou Zusheng, Xiao Ouzheng, et al. Study and analysis of high-power coupler failure due to asymmetric electric field distribution[J]. Vacuum, 2024, 227: 113406. doi: 10.1016/j.vacuum.2024.113406 -
下载:
点击查看大图
图(10)
计量
- 文章访问数: 46
- HTML全文浏览量: 20
- PDF下载量: 9
- 被引次数: 0
